Skip to main content
Contribution to Book
NovaSil Clay for the Management of Dietary Aflatoxins in Human Populations
Mycotoxins: Detection Methods, Management, Public Health and Agricultural Trade (2008)
  • Evans Afriyie-Gyawu, Georgia Southern University
  • Jonathan H. Williams, University of Georgia
  • Henry J. Huebner, Texas A & M University - College Station
  • Nii-Ayi Ankrah, University of Ghana
  • David Ofori-Adjei, University of Ghana
  • Pauline E. Jolly
  • Jia-Sheng Wang, Texas Tech University
  • Timothy D. Phillips, Texas A & M University - College Station

Cost-effective interventions that reduce human diseases and death from aflatoxin exposure are high priorities particularly for developing nations. A calcium montmorillonite clay, NovaSilTM, when mixed at low inclusion rates with animal feeds can act as a selective enterosorbent for aflatoxins. NovaSilTM sequesters aflatoxins in the gastrointestinal tract and neutralizes their toxic effects by reducing the bioavailability of the toxins in the blood and other organs. These findings are especially significant for developing countries since clay-based strategies for managing aflatoxicosis would be practical, culturally acceptable, sustainable and unique in reducing external exposure and risk. When included in the diet of animals at levels up to 2.0% (w/w), NovaSilTM clay did not interfere with vitamin or micronutrient utilization. These results also support the hypothesis that NovaSilTM clay interventions in developing countries could have a major impact on health and well-being of susceptible humans who are highly and frequently exposed to these dietary toxins without compromising their nutritional status. Recent work has confirmed the relative safety of NovaSilTM in a long-term rodent study at and in a Phase I Adverse Events trial. No significant NovaSilTM-related effects were observed in either study, and the conclusions were that NovaSilTM should be tested in a Phase II human trial in Ghana. A study population in Ghana has been identified that is exposed to high levels of dietary aflatoxins based on biomarkers in their blood and urine samples. This study will evaluate the consequences of NovaSilTM treatment on aflatoxin exposure over a 3-month period. In summary, enterosorption strategies, based on dietary NovaSilTM clay, hold great promise for the management of aflatoxins in high-risk human populations especially in developing countries. The remedy is novel, inexpensive and easily disseminated.

Publication Date
J. Leslie, R. Bandyopadhyay, and A. Visconti, eds.
CAB International Publishing
Citation Information
Evans Afriyie-Gyawu, Jonathan H. Williams, Henry J. Huebner, Nii-Ayi Ankrah, et al.. "NovaSil Clay for the Management of Dietary Aflatoxins in Human Populations" United KingdomMycotoxins: Detection Methods, Management, Public Health and Agricultural Trade (2008)
Available at: